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Previous issue date: 2007-07-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Latexes based on acrylic acid, acrylamide, ethyl methacrylate, and ethyl acrylate were synthesized via emulsion polymerization with different monomer compositions.
The resultant latices were thickened with different molar ratios of NaOH to acrylic acid and were analyzed in terms of acid‐basis titrimetry, turbidimetry, rheology, and tensiometry. Titrimetry, turbidimetry, and rheometry were used to analyze factors such as carboxyl group availability and particle solubilization, tensiometry monitoring the influence of carboxyl neutralization on polymer‐surfactant interactions. For the acrylic acid content used in this work (20 wt%), the results indicated that as carboxyl groups distribution became more homogeneous, the process of latex thickening became more effective / L?tices baseados em ?cido acr?lico, acrilamida, acrilato de etila e metacrilato de etila foram sintetizados via polimeriza??o em emuls?o com diferentes composi??es
monom?ricas. Os l?tices resultantes foram espessados a diferentes raz?es molares de NaOH/?cido acr?lico. Titrimetria ?cido‐base, turbidimetria, reometria e tensiometria
foram usados para analisar fatores tais como a disponibilidade de grupos carboxila e a solubiliza??o de part?culas, a tensiometria sendo usada para monitorar a influ?ncia da
neutraliza??o de grupos carboxilas nas intera??es pol?mero‐surfactante. Para o teor de ?cido acr?lico usado neste trabalho (20 m/m%), os resultados indicaram que, a medida
em que a distribui??o de grupos carboxilas torna‐se mais homog?nea, o processo de espessamento tornou‐se mais efetivo
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17597 |
| Date | 31 July 2007 |
| Creators | Santos, Zilvam Melo dos |
| Contributors | CPF:90623207753, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4788562T6, Pereira, M?rcia Rodrigues, CPF:83115951787, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4788568T8, Silva, Djalma Ribeiro da, CPF:13893734449, http://lattes.cnpq.br/2791074318745945, Rabello, Marcelo Silveira, CPF:41924371472, http://lattes.cnpq.br/0384726674523131, Fonseca, Jos? Luis Cardozo |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Qu?mica, UFRN, BR, F?sico-Qu?mica; Qu?mica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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